In this paper, we propose to use a new nonparametric noncoherent detector for PN code acquisition in DS/CDMA systems. Because this detector is nonparametric, we can decide the threshold of the detector without "rst having to estimate the variance of time-varying interference. We compare the single-dwell scheme using the proposed detector with that using the conventional detector. From the simulation results, it is clear that the DS/CDMA system with the proposed detector has better performance than that with the conventional detector when the exact estimation of the interference variance is not possible. ( 2000 Elsevier Science B.V. All rights reserved. Zusammenfassung In diesem Artikel schlagen wir vor, einen neuen, nichtparametrischen, nichtkohaK renten Detektor zur Erfassung von PN Codes in DS/CDMA Systemen zu benutzen. Da es sich um einen nichtparametrischen Detektor handelt, koK nnen wir seine Schwelle ohne vorhergehende SchaK tzung der Varianz der zeitveraK nderlichen StoK rung festlegen. Wir vergleichen die single-dwell Methode, die den vorgeschlagenen Detektor benutzt mit der konventionellen Methode. Anhand der Simulationsergebnisse wird deutlich, da{ das DS/CDMA System mit dem vorgeschlagenen Detektor bessere Ergebnisse liefert, als mit dem konventionellen Detektor wenn eine exakte SchaK tzung der StoK rvarianz nicht moK glich ist. ( 2000 Elsevier Science B.V. All rights reserved.
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